Bio Unit 5 - Protein Synthesis Quiz

Which correctly places the events of protein synthesis in order?

• DNA pairs with tRNA; tRNA takes amino acid to ribosome; peptide

  bonds form between amino acids

• mRNA produced from DNA; travels to mitochondria; mRNA pairs with

  tRNA; carbohydrates from polymers

• make mRNA; mRNA moves to ribosomes; mRNA pairs with tRNA;

  peptide bonds form between amino acids

• DNA replicated; DNA copy travels to ribosome; DNA pairs with mRNA;

  peptide bonds form between amino acids

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Amanda gets protein at lunch by eating a chicken sandwich. How can Amanda’s body use the protein in the chicken to build protein in her cells?

• The proteins in the chicken are used directly as proteins in Amanda’s cells.

• The proteins in the chicken are refolded, and then Amanda’s cells can use them.

• The proteins in the chicken are broken down into amino acids, and the DNA in Amanda’s cells uses those amino acids to build human proteins.

• The proteins in the chicken are digested, and the amino acids are changed to human amino acids so Amanda’s DNA can use them to build proteins.

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During the process of transcription, a DNA sequence of A-T-G-T-C-A would code for which RNA sequence?

• T-A-C-A-G-T

• U-T-C-T-G-U

• U-A-C-A-G-U

• A-U-G-U-C-A

Protein synthesis for eukaryotic cells begins at what location and involves which process?

• at the ribosome for transcription

• at the ribosome for translation

• in the nucleus for transcription

• in the nucleus for translation

How many amino acids are affected by the deletion of one nitrogen base?

• All amino acids are affected.

• No amino acids are affected.

• All amino acids before the point of change are affected.

• Amino acids from point of change and further on are affected.

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Which statements explain the primary difference between the structure of a nucleic acid and the structure of a protein?

• A nucleic acid has alternating base pairs. A protein has alternating peptides.

• Nitrogen bases form the backbone of a nucleic acid. Peptides form the backbone of a protein.

• Nucleotides link together to form a nucleic acid. Amino acids link together to form a protein.

• A nucleic acid is held together by the sugar-phosphate complex. A protein is held together by the carbon-carbon bonds.

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The directions for making a protein

• result in DNA.

• are coded by DNA.

• are coded by amino acids.

• results in tRNA

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During replication, the nucleotide sequence in a DNA molecule changed from TGC CAA CTG to TGC CCA ACTG. What will most likely happen in the resulting protein?

• It will replicate the same DNA molecule.

• There will be no change in the resulting protein.

• The resulting protein will destroy other proteins.

• It will result in a different sequence of amino acids.

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Which of these shows the correct order for the central dogma of molecular biology?

• DNA to protein to RNA

• RNA to DNA to protein

• protein to DNA to RNA

• DNA to RNA to protein

A mutation has occurred within a cell, and it produces the wrong protein. If the mistake originated during the very beginning stages of protein synthesis, when did the mistake occur?

• when the mRNA message was translated

• when the ribosomes assembled amino acids

• when the tRNA brought amino acids to the ribosomes

• when the mRNA message was made from the DNA template

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